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Expedition / Navigator

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Old 11-30-2008, 03:41 AM
Join Date: Sep 2008
Posts: 19
4.6 to 5.4 conversion

got a 98 xlt 4x4 with stock 4.6 with 181,000 miles now. What all would be needed besides the engine to change to the 5.4? Like, could i use same transmission I have now and other stuff?
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Old 11-30-2008, 08:17 AM
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Join Date: Apr 2004
Location: missing Texas...
Vehicle: 200? FORD
Posts: 12,935
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severla people have done this exact swap recently go to the engines room and take a look

you can pretty much doa plug and play with a 2 valve or navigator 32 valve 5.4.

you can run your current transmission but you'll want to change torque converters

also you'll need the 5.4 intake manifold, y pipe and a tune for your 4.6 ecm

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Old 11-30-2008, 08:17 AM


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